目的:肺癌已成为人类癌症死亡的主要原因之一,早期发现、早期诊断与治疗是提高肺癌患者5年生存率的关键。过去早期肺癌的普查主要依靠胸部透视和拍片,对于较小的肺癌容易漏诊。虽然多层螺旋CT在肺癌普查的应用过程中存在一些问题,但具有更低的X线剂量、较快的采集与重建速度、便捷多样的重建处理、好的图像质量及舒适度等特点,有较好的临床应用前景。 OBJECTIVE: Lung cancer has become one of the major causes of cancer death in humans. Early detection, early diagnosis and treatment are the keys to improve the 5-year survival rate of lung cancer patients. The early census of lung cancer mainly rely on chest fluoroscopy and filming, easy to miss for smaller lung cancer. Although MSCT has some problems in the application of lung cancer screening, it has the characteristics of lower X-ray dose, faster acquisition and reconstruction speed, convenient and diverse reconstruction, good image quality and comfort, etc. Better clinical application prospects.